Scroll to see break-even price per barrel for oil in 2015 for select oil producers, and click on a country's name for more details. modest oil-price recovery and currency devaluations have lowered breakeven prices for countries like Russia and Nigeria, but some petrostates still need oil prices above $100 a barrel to balance their budgets.
There are dozens of types of gemstones â including diamonds, colored gemstones, and pearls â each with a unique set of physical and optical properties. GIRDLE â The narrow band around the perimeter of a polished or faceted diamond or colored gemstone.
With a clear faceted stone, such as a diamond, a shallow groove is cut into the bezel itself. The girdle or widest part of the gem stone is placed in the bezel, which is then pushed down over the girdle. The pressure of the bezel over the edge of the diamond keeps it in place.